Glass-forming machine



Feb. 19, 1929. 1,702,498

A. N. CRAMER GLASS FORMING MACHINE Filed Feb. 25, 1927 3 Sheets-Sheet l INVENTOR Feb. I9, 1929.

Filed Feb. 25, 1927 5 Sheets-Sheet 2 I. g 1 w, w r WWW/WW4?! /v n 9. 4 l I I I y 1 44 q 4 M I 3. u

Feb. 19, 1929. 1,702,498

A. N. CRAMER GLASS FORMING MACHINE Filed Feb. 25, 1927 3 Sheets -Sheet 3 INVENTOR %W Patented Feb. 19, 1929.

UNITED STATES FATE]? QFFICE.

ALBERT N. CRAMER, OF TOLEDO, OHIO, ASSIGNOR TO THE Oil/ENS BOTTLE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF DHIO.

GLASS-FORMING MACHINE.

Application filed February 25, 1927.

The present invention relates to improvements in glass forming machines, and more particularly to mold bottom construction. In the type of mold bottom with which this invention is illustrated, said bottom is made up of a plunger section movable 1ongitudi-- nally through an annular section, said sec tions being shaped to enact with each other to form the bottom of ware in the finishing mold. The plunger section may, for cxanr pie, be of a shape to form a re-entrant bottom in the bottle which is being produced. The usual practice has been to support said plunger section in its uppermost or operative position, by a continuous cam track whose active face is of such shape that it permits the plunger section to drop down into the annular section of the mold bottom during intervals between the finish blowing operations. Because of the difficulty encoun tered in accurately forming the face of the plunger supporting cam track, said track is such that it frequently causes the plunger section to move up and down slightly in the annular mold bottom section during blowing of the ware, causing alternate contraction and expansion of portions of the glass forming the bottom of the ware, such condition resulting in the formation of checks or rough portions upon the bottoms of the ware being produced.

An object of the present invention to eliminate the formation of checks or rough portions on the ware bottoms by locking the plunger section against the described movement relative to the annular bottom section during blowing of the ware to its final form.

A. further object is to provide means operating automatically at proper intervals to unlock the plunger section, thereby permitting the plunger section to drop away from 'thebottle or other article being blown, just prior to reaching the station at which the ar ticle is to be ejected from the forming machine.

Other objects will be apparent hereinafter.

In the accompanying drawings:

Fig. 1 is a part sectional elevation of one head or unit of a glass forming machine showing the adaptation of my lock to the sectional bottom of a finishing mold.

Fig. 2 is a detail side elevation of a finishing mold bottom showing my invention applied thereto.

Fig. 3 is a sectional view taken on the line Serial No. 170,806.

III-III of Fig. 2, showing the mold bottonrlock in operation.

Flg. is a sectional View similar to Fig. 3, showing the lock in inoperative position and the push-np bottom spindle in its lowermost position.

Fig. 5 is a detail transverse section taken along the line V-V of Fig. at.

Fig. 6 is a part sectional elevation showing a modified form of lock, said lock being in an inoperative position.

Fig. 7 is a view similar to Fig. 6 showing the push-up mold bottom locked in its uppermost position.

Fig. 8 is a fragmentary side elevation taken at right angles to the showing in Figs. 6 and 7.

Fig. 9 a detail view showing the manher in which the lock shown in Figs. 6, 7 and 8 is operated.

Referring to the accompanying drawings, the machine to which the present invention is shown applied, comprises a stationary vertical column 110, a carriage rotatable about the column 10 and including a bottom section 11 mounting thev finishing molds 12, and an intermediate section 13 having suitable operating connections with a turnover unit including a neck mold 14. A blank mold 15 is arranged above and periodically coacts with the neck mold Li and is adapted to receive charges of glass through its open upper end from any suitable source of supply (not shown) by way of a funnel guide 16 located above the intermediate section 13. After a charge of glass has been delivered to the blank mold, the funnel guide 16 is shifted laterally so that a blowing head 17 may be brought into operative position over the upper end of said blank mold. Upon completing the blank formation, the turnover unit is revolved about its horizontal axis 18 to swing a bare parison or blank (not shown) from the blank mold to apendent position in which it enclosed by the finishing mold sections 12 for blowing to the final form of the article being produced. Following blowing of the article in the finishing mold 152, the finishing mold sections separate at a predetermined station and suitable cam mechanism operates to tilt the finishing mold bottom to thereby eject the completed article from the machine. It is understood that a forming machine of the character illustrated, comprises an annular series of units such as that shown in Fig. 1 and that the carriage supporting these units rotates continuously about the stationary central column 10, successively bringing the molds to the various operating stations. lreterahly, continuous rotation of the carriage is effected by providing said carriage with an annular gear 19 with which a driving pinion 20 meshes, said pinion receiving its power from any suitable source.

The finishing mold bottom comprises a body portion 25 ct cup-like formation including a depending tubular guide or sleeve 26. The body portion is journalled in horizontally aligned bearings 27 located inwardly from the vertical. center of the mold bottom which is adapted to be tilted outwardly about said bearings 27 at a predetermined station to discharge a completed article.

For this our ose, an angular sun aortin arm 28 is provided and includes a normally pendent portion 29 mounting a cam roll 30 which normally contacts with a vertically movable cam 31. This cam 31 is caused. to move periodically relative to the machine proper by a cam track lYith lifting of" the ram 31, the normally pendent portion 29 or the angular arm 28 swings inwardly about the axis of the bearings 2i, causing the other portion 33 of the angular arm 28 to tilt down wardly and transmit to the finishing mold bottom a. corresponding degree of tilting movement so that the finished article will be thereby ejected. An adjusting screw 22 carried by the horizontal portion 33 of the angular arm 23 permits, changing of the angular relation between the mold bottom and said arm.

Arranged within the cup-lilre body portion 25 of the mold bottom, is an annular section 35 having a portion projecting upwardly and provided with an annular rib 36 adapted to snugly fit into recesses formed in the inner faces of the finishing mold sections 12 when the mold is closed. A. plunger section 37, which, in. this instance, is shaped to form a re-entrant bottom in. the ware being produced is slidably arranged within the annular section 35 and formed with a depending spindle 38 extending into the guide 26 formed on the lows end of the cup-like body portion 25 oi the mold bottom. The lower end of the spindle 38 carries a depending threaded stem 39 having threaded engagement with an adjusting ring or collar 10, said ring 1 rovided with an external annular groove 11 adapted at times to receive a locking detent all" as will be pointed out here inat'ter. By rotating the externally grooved adjusting collar all, the plunger section 37 of the mold bottom may be raised or lowered so that the meeting upper surfaces of said plunger section and the annular section 35 ot' the mold bottom may be aligned with each other. A spring pressed detent l2 carried by the spindle 38 may project into any one of an annular series of recesses and serves to lock the spindle 3S and the adjusting col lar 40 against accidental relative movement, to thereby permit any setting desired.

The adjusting collar 40 also carries an uni-- ally arranged depending stem 43 which is externally screw threaded. and has threaded engagement with a shoe 1 which periodically contacts with a station t aclr 4.5 for the purpose oi? transn upward movement to the pli the mold bottom. This sho toward and from the collar n .y be locked against accidental relai ve movement by a spring pressed detent 4C5, projecting upward into any one of an annular series of recesses 21 (Fig. 5). Axial adjustment of this shoe by rotation, provides means for properly positioning the collar 4.0 to insure engagement of the main lockin table detour 4:7 with the groove in the adjusting collar il) at proper intervals.

The detent 47 which projects through. a radial opening in the tubular guide 5 an l into the annular groove 41 formed in the adjusting collar 40, has a pin and slot connection with a bell crank lever 18. This lQY pivoted between ears 49 formed on tl lar guide 26 and has one arm 50 pivoted to a connector 51 slidable vert ally in spa guides 52 and carrying at the upper roller 53 adapted at times to be engaged by an inclined cam face 5% formed on one of the finishing mold section carriers 55. This connector 51 preferably comprises a short stem or rod 56 whose upper end extends into a sleeve 57, said sleeve being slidable in the upper guide 52. A coil spring 58 bears against the end of the stem which extends into the sleeve and exerts a downward pressure on said stem to thereby maintain the connector mar. mum length. A second coil spring 59 surrounds the stem 56, and has one end bearing against the lower rod guide 52, whil its upper end engages the adjacent end of the sleeve 57. This spring serves to yieldably hold the sleeve and cam roll 53 in their uppermost positions in which the roll may be readily engaged by the inclined cam ot' the mold. sections carrier when the mold close In operation, a formed parison is transferred from the blank mold 15 to the finishing mold 12 for final blowing. As the finishing mold sections 12 move to *ard each other to the closed position 3), the inclined cam. 54 of the mold section carrier 55, engages the roller 53, causing downward movement of the latter, together with the connector 51, and consequent rocking of the bell crank lever to move the detent l? inwardly. J 11st prior to this rocking of the bell cranl: lover -18. the stationary cam track has caused ward movement of the spindle 38 to a posit.

llfl) in which the upper faces of the plunger section 37 and the annular section ot' the mold bottom (Fig. 3) are properly aligned. Because of previous adjustment of the collar 40 and the shoe ll, this upward movement of the plunger section 37 in the annular section 35 brings the adjusting collar to a position in which the annular glfl li or channel all of said collar will receive the inner end of the locking dctent 4C7 upon rocking of the bell crank lever 48 as above stated. Act a predetermined station, the stationary cam track is formed with a downward dip (not shown). As the finishing mold approaches saia downwardly dipped portion of the stationary cam tracl 45, the mold sections begin to open under influence of well known means (not shown) and thereby disengage the inclined cam on the finishing mold section carrier from the roller 53. This permits the spring 59, surrounding the rod 56, to expand, thereby rocking the bell crank lever t8 and cansing retraction of the detent 47 so that the spindle 38 and plunger section 37 may drop away from the article being blown. Immediately following lowering of the plunger section 37, cam mechanism heretofore referred to, and including the vertically movable cam 31 (Fig. 2) operates to tilt the mold bottom causing ejection of the ware at a predetermined station. Thus, during the tin-til blowing of an article, the mold bottom sections are held against relative movement so that checks, etc, are not formed on the ware bottoms.

In another form of the invention (Figs. 6 to 9, inclusive), the detent 4:7 is slidable through a radial opening in the guide 26 and is pivoted at its outer end to the upper end of an arm 66 which carries a laterally directed counterweight 67 at its lower end. This arm 66 is pivoted at a supporting bracket 68 substantially at its point of connection to the counterweight so that said counterweight when free to function, drops downwardly causing inward movement of the do tent 47 to a locking'position (Figs. 7 and 9). Vertical movement of the plunger section 37 within the annular section 35 of the mold bottom is effected by engagement of the shoe l lwith a continuous stationary cam track 69, said cam track 69 being formed with a raised section 70 (Fig. 9) in proximity to the station at which the. finishing mold l2 closes around a parison to be blown. During the period of time that the finishing mold is located substantially over the raised portion 70 of the cam track, it is necessary that the locking detent 47 be engaged in the annular groove ll of the plunger adjusting collar 40. Consequently, the counterweight supporting cam track 71 terminates substantially at the opposite ends of this raised port-ion 70 of the cam track so that the counterweight 67 may drop downwardly to rock the arm 66 and project the detent 47 into the groove 41 in the adjusting collar 40.

Because of the fact that contact between the shoe 44 and the frequently irregularly formed cam track 69 frequently causes vertical reciprocation ot the plunger section 37 wit-h objectionable results as pointed out. the raised i ortion 70 ot the cam track is formed with a hump 7 2 at one end, said hump serving initially to elevate the plunger suiiiciently to align the annular groove ll of the adjusting collar elO with said detent 47 allowing interlocking of the mold bottom sections. This cam track, beyond the hump 72, is suiticiently spaced below the shoe i l to insure against contact thcrebetween and thereby prevent any tendency the cam t ack would have ordinarily to force the plunger 37 upwardly against the locking action on the detent 4:7. The advantages are obvious. By changing the points at which the ends of the counterweight operating cam track 71 terminate and changing to a greater or less degree the length of the raised portion 70 of the plunger operating cam track 69, raising and lowering of the plunger section 37 ot' the mold bottom may be properly timed with opening and closing of the finishing molds and tilting of the mold bottom section.

hilani'testly, certain minor changes may be resorted to within the spirit and scope of the appended claims.

lVhat I claim is:

1. A glass forming mold comprising a body portion, a mold bottom including an annular section and a vertically movable plunger section in said annular section, and means automatically operable at predetermined time intervals to interlock the mold bottom sections.

2. A glass forming mold comprising a body portion, a mold bottom including an annular section and a Vertically movable plunger section in said annular section, means causing proper relative positioning of the mold bottom sections, and means operating automatically to interlock said sections after said proper positioning.

3. A glass forming mold comprising a body portion, a mold bot-tom including an annular section and a vertically movable plunger section in said annular section, means automatically operable at predetermined time intervals to interlock the mold bottom sections, and means operating at a predetermined period to release said plunger section for downward movement within the annular section.

t. A glass forming mold comprising a body portion, a mold bottom including an annular section and a vertically movable plunger section in said annular section, means causing proper relative positioning of the mold bottom sections, means operating automatically to interlock said sections after said proper positioning, and means operating at a predetermined station to release said plunger section for downward movement in the annular se tion.

5. A glass forming mold comprising a body portion, a. mold bottom including annular section and a vertically movable plunger section slit able through said. annular section, and means operating automatically to interlock the mold bottom sections and later to release the plunger section for downward moveuiient in. the annular section.

6. In combination, a continuously rotating mold carriage, a. forming mold on said can riage, a tiltable mol l bottom for said forming mold including an annular section. and vertic-ally movable plunger section slidable with in. said annular section, a stationary cam track formed to move the plunger section vertically at a predetermined station, and means operating automatically to interlock said mold sections at a predetermined ion.

7 In combination, a continuously rotating mold. carriage, a forming mold on said carriage, a tilta-ble mold bottom for said forming mold including an annular section and a vertically movable plunger section slidablc within said annular section, a stationary cam track formed to move the plunger section verieally at a predetermined station, means operating automatically to interlock said mold sections at a predetermined station, and cam mechanism operating to release the pumger section for downward vertical movement at a succeeding station.

8. In combination, a continuously rotating mold carriage, a forming mold on s id carriage, a. tiltable mold bottom for said forming mold including an annular section and vertically movable plunger section slidable within said annular section, a stationary cam track formed to move the plunger section vertically upward at a predetermined station, means operating automatically to interlock said mold bottom sections at a predetermined station, and adjustable means for controlling the relation between said sections during the period of interlocking engagement between said sections.

In combination, a continuously rotating mold carriage, a forming mold on said carriage, a t-iltable mold bottom for said tormmold including an annular section and a vertically movable plunger section slidable within said annular section, a stationary cam track formed to move the plunger section vert. ally upward at a predetermined station, means operating automatically to interlock said mold sections at a predetermined sta ion. and adjustable means for varying the degree of movement of the plunger section under influence of said cam.

10. The combination ot a continuously rotating mold carriage. a forming mold thereon including mold halves movable toward and from each other to close and open the mold; a mold bottom including an annular memes section and a vertically movable plunger section in said annular section, and means actuated by movement of the mold halves toward each other to interlock the mold bottom sections.

11. The combination of continuously rotating mold carriage, a forming mold thereon including mold halves movable toward and from each other to close and open the mold; a mold bottom including an annular section and a vertically movable plunger section in said annular section, a. sliding detent for interlocking the two mold sections, and means actuated by movement of the mold halves toward e la other to move the detent to loch- 5 .ion.

l glass forming mold comprising a mold halves movable toward and from each other to close and open the mold, a mold bottom including relatively movable sections, and a sliding detent carried by one section and movable at intervals to inter- I )el: said sections.

in glass forming mold comprising a pair or mold halves mc vaole toward and from each other to alternately close and open the mold. a mold bottom including relatively mm ble sections, means lock the sections against relative movement, and a cam operable b movement of one of the mold halves to operatively posrnon the loc ring means.

. A glass forming mold comprising a body portion, a mold bottom including relaly movable sections, means carried by one .t ion and operable to interlock said sections, and means carried by the mold body controlling operation of the locking means.

15. A glass forming mold comprising a body portion, a mold bottom including relae tively movable sections, means carried by one section and operable to interlock said sections, means carried by the mold body contolling operation of the locking means, and ad usting means to change the degree of movement between said. sections.

16. A glass forming mold comprising a pair of mold halves mova ale toward and from each other to close and open the mold, mold bottom including" relatively movable .ecrions, a sliding detent carried by one seeti on, a cam formed on one of the mold halves, and yieldable devices connected to said detent and operable by the cam to cause interlocking of the mold bottom sections.

17. Glass forming apparatus comprising. in combination, a continuously rotating mold. carriage, a partible mold thereon, a. mold bottom comprising telescoping sections, cam mechanism operable to periodicall cause rel ative movement of the mold bottom sections, and automatic means interlocking the sections at predetermined intervals.

18. In combina ion, a continuously rotating mold carriage. a partible mold thereon, a mold bottom including a movable plunger section, an annular section around said plunger, a spindle depending from said plunger section, a guide for the spindle, a shoe fixed to the lower end of the spindle and adjustable to vary the spacing between the plunger section of the mold bottom and said cam, and means operating automatically to interlock the mold bottom sections at predetermined intervals.

19. In combination, a mold including a body portion, a mold bottom comprising an annular section, a vertically movable plunger section in said annular section, a spindle depending from the plunger section, a stationary guide for said spindle, a shoe located below said spindle, an adjustable connector interconnecting the shoe and spindle and operable to vary the spacing between said shoe and spindle, means engaging the shoe and formed to transmit an upward movement to the plunger section and spindle at times, and means operating automatically to interlock the spindle guide and said connector when the plunger section reaches its uppermost limit.

20. In combination, a mold including a body portion, a mold bottom comprising an annular section, a vertically movable plunger section in said annular section, a spindle depending from the plunger section, a stationary guide for said spindle, a shoe located below said spindle, an adjustable connector interconnecting the shoe and spindle and operable to vary the spacing between said shoe and spindle, means engaging the shoe and formed to transmit an upward movement to the plunger section and spindle at times, a detent slidable through said spindle guide and adapted to engage the connector to interlock the mold sections, cam means operating to periodically move the plunger section vertically upward, and automatic means for alternately reciprocating said detent in timed relation with vertical movement of the plunger section.

21. In combination, a tiltable mold bottom comprising a supporting member and tubular guide depending from said member, an annular section supported on said member, a plunger section slidable in the statonary annular section, a spindle carried by the plunger section and extending into said guide, a shoe arranged below the guide, a connector interconnecting the shoe and spindle, means operable to lock said connector against longitudinal movement in the guide, said connector being rotatable to vary the relative positions of the annular section and the plunger section, and means adapted to engage said shoe to periodically move the plunger section to its uppermost position.

22. In combination, a tiltable mold bottom comprising a supporting member and tubular guide depending from said member, an annular section supported on said member, a plunger section slidable in the annular section, a spindle carried by the plunger section and extending into said guide, a shoe arranged below the guide, a connector interconnecting the shoe and spindle, means operable to lock said connector against longitudinal movement in the guide, said connector being rotatable to vary the relative positions of the annular section and the plunger section, a stationary cam track formed to engage the shoe and periodically move the plunger section to its uppermost position, and means operating automatically to release the connector at predetermined intervals.

23. A tiltable mold bottom comprising an annular section, a plunger section slidable Within the annular section, and means operable at times to interlock said sections including a sliding detent, and a cam to actuate the detent.

Q-l. A t-ilta-ble mold bottom comprising an annular section, a plunger section slidable within the annular section, a detent for interlocking said sections, a pivoted arm connected to said detent, and a means to rock the arm at intervals causing movement of the detent into locking position.

25. A mold bottom comprising an annular section, a plunger section movable in the annular section, a stationary cam track formed to move said plunger section vertically at a predetermined station, a detent carried by the annular section, and cam actuated mechanism causing movement of the detent into and out of locking engagement with the plunger section.

Signed at Toledo, in the county of Lucas and State of Ohio, this 23rd day of February- 1927.

ALBERT N. GRAMER. 

